Can a wire gauge be too large?

Why... voltage drop, same reason headlights work better on my relay kit and larger ga wire! watts = volts x amps

I guess I'm a knucklehead for running 2/0 battery cable to you, but, my high compression stuff starts without issue. I've been down the 2 and 1 gauge wire route and prefer the beastly heavy 2/0 cable.

Total weight difference between a 20 foot section of 2/0 and 1 ga... 4 pounds! 4.6 pounds to the 2 ga. No thank you. I'll deal with the weight penalty. :)

Pick your parts, pay your money.